<SEC-DOCUMENT>0001193125-24-215436-index.html : 20240909
<SEC-HEADER>0001193125-24-215436.hdr.sgml : 20240909
<ACCEPTANCE-DATETIME>20240909060634
ACCESSION NUMBER:		0001193125-24-215436
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		27
FILED AS OF DATE:		20240909
DATE AS OF CHANGE:		20240909

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MBX Biosciences, Inc.
		CENTRAL INDEX KEY:			0001776111
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-281764
		FILM NUMBER:		241285721

	BUSINESS ADDRESS:	
		STREET 1:		12406 HORESHAM STREET
		CITY:			CARMEL
		STATE:			IN
		ZIP:			46032
		BUSINESS PHONE:		3179893100

	MAIL ADDRESS:	
		STREET 1:		12406 HORESHAM STREET
		CITY:			CARMEL
		STATE:			IN
		ZIP:			46032
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-1/A
<SEQUENCE>1
<FILENAME>d790774ds1a.htm
<DESCRIPTION>S-1/A
<TEXT>
Document 1 - file: d790774ds1a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.1
<SEQUENCE>2
<FILENAME>d790774dex11.htm
<DESCRIPTION>EX-1.1
<TEXT>
Document 2 - file: d790774dex11.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-3.1
<SEQUENCE>3
<FILENAME>d790774dex31.htm
<DESCRIPTION>EX-3.1
<TEXT>
Document 3 - file: d790774dex31.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>4
<FILENAME>d790774dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 4 - file: d790774dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.7
<SEQUENCE>5
<FILENAME>d790774dex107.htm
<DESCRIPTION>EX-10.7
<TEXT>
Document 5 - file: d790774dex107.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>6
<FILENAME>d790774dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 6 - file: d790774dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>7
<FILENAME>d790774dexfilingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 7 - file: d790774dexfilingfees.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g790774dsp01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g790774dsp01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g790774g00a06.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g790774g00a06.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g790774g00m01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g790774g00m01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g790774g00s44.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g790774g00s44.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g790774g02s97.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g790774g02s97.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g790774g14v41.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g790774g14v41.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g790774g40a82.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g790774g40a82.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g790774g43a01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g790774g43a01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>g790774g48m48.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: g790774g48m48.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>g790774g59i17.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: g790774g59i17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>g790774g70y95.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 18 - file: g790774g70y95.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>g790774g72d51.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 19 - file: g790774g72d51.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>g790774g75h77.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 20 - file: g790774g75h77.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>g790774g75q33.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 21 - file: g790774g75q33.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>g790774g77b51.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 22 - file: g790774g77b51.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>g790774g80i17.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 23 - file: g790774g80i17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>g790774g80w10.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 24 - file: g790774g80w10.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>g790774g82i98.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 25 - file: g790774g82i98.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>g790774g83a26.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 26 - file: g790774g83a26.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>g790774g84m86.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 27 - file: g790774g84m86.jpg

</DOCUMENT>
</SEC-DOCUMENT>